Black Drongo is a relatively common bird in Hong Kong, perhaps not in the top tier, but I saw the species most places that I went. I found them to be quite shy, and managed only one brief sequence of shots - the bird flew away after a mere five seconds once I revealed myself by popping out from behind a bush on Lantau. A shame, as I would have liked to have been a lot closer. I think this must be a young bird, though it seems quite advanced for the time of year - I cannot explain the fluffy grey feathers on the back - it would seem odd for a bird to moult in May. There is another speceis in HK, called Hair-crested Drongo, but I only saw that once, so whilst they look very similar, my gut feel is that this must be Black. Dull light, but I like the simplicity of the photo.